Improvement in insulating covebing foe telegeaph and oieouit-wiees



PATENTE() @ad M @uitrit grietas @anni @frn PERCHA COMPANR 0F SAM-E PLAGE. Letter; Patent No. 71,688, dated December 8, 1867.

SAMUEL C. BISHOP, or NEW Y0RK,N. Y., A-SSIGNOR To BISHOP GUTTA- IMPROVEMENT IN INSULATINGrA GOVBING FOR TELBGRAPH ND'GIRGUIT-WIRES.

@he .tbrtulr refemx tu in thm tetters Extent mth Innung par: nt the samt. l

in f.

To ALL wHoM 1T MAY QCONCERN:

Be it knownthat I, SAMUEL C. BISHOP, of the city, county, and State of NewYork, have lited a. new and useful Improvement in Insulating Telegraph and Electric-Wires or Conductors, of which the'rollowing is a full; clear, and exact description. thedrawings accompanying this speoilcation- Figure 1 represents asection of telegraph-wire coated with my improved insulator, and Figure 2, a transverse section of .the saure, in which A represents the wire, and B the gum coating applied thereto. i i

My invention consists in insulating telegraph and electric wires or conductors, by using, as India rubberor gutta perche. have heretofore been employed for that purpose, a gum known as valataor balata, and which is obtained from a. tree or plant indigenous tu certain portions of South America, but which is more tractahle and easier to 1work than India' rubber in its unprepared state, and less brittle than gutta percha7 and'capable of being worked or used underl much higher temperatures than the latter substance. Y

To ceet telegraph-wires with valata or balata,- this gum may first be -treated as gutta percha is treated, by soaking, macerating, and kneadiug, or working it into a plastic mass, and applying it to and round the wire by a suitable pressing-device and die, as or much in the same manner as telegraph-wires are now coated with gutta percha or rubber. Beirg so much more easily worked than rubber, and less brittle and unaffected by high temperatnres than gutta percba., this gum, which may be manipulated in hotter water than the latter substance, will be a most advantageous substitute for eitherrubber or gutta perche. for the purpose here mentioned.

What I claim as my discovery, and desire to secure by Letters Patent, is-

Insnlating telegraph and electric wires or conductors by means of valata or balata, substantially as specicd.

SAML. C. BISHOP. Witnesses: Y

P. NoLAN,

GEORGE H. Suns. 

